GB1591935A - Method of forming flows in heat- and mass-exchange apparatus - Google Patents

Method of forming flows in heat- and mass-exchange apparatus Download PDF

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Publication number
GB1591935A
GB1591935A GB1944178A GB1944178A GB1591935A GB 1591935 A GB1591935 A GB 1591935A GB 1944178 A GB1944178 A GB 1944178A GB 1944178 A GB1944178 A GB 1944178A GB 1591935 A GB1591935 A GB 1591935A
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United Kingdom
Prior art keywords
medium
portions
heat
mass
media
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.)
Expired
Application number
GB1944178A
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.)
MOSKOV INST KHIM MASHINOSTR
Original Assignee
MOSKOV INST KHIM MASHINOSTR
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 MOSKOV INST KHIM MASHINOSTR filed Critical MOSKOV INST KHIM MASHINOSTR
Priority to GB1944178A priority Critical patent/GB1591935A/en
Publication of GB1591935A publication Critical patent/GB1591935A/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28C—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA COME INTO DIRECT CONTACT WITHOUT CHEMICAL INTERACTION
    • F28C3/00—Other direct-contact heat-exchange apparatus
    • F28C3/06—Other direct-contact heat-exchange apparatus the heat-exchange media being a liquid and a gas or vapour
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/12—Washers with plural different washing sections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/18—Absorbing units; Liquid distributors therefor

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treating Waste Gases (AREA)
  • Gas Separation By Absorption (AREA)

Description

(54) METHOD OF FORMING FLOWS IN HEAT- AND MASS EXCHANGE APPARATUS (71) We, MosKovsKY INSTITUT KHIMICHESKOGO MASHINOSTBOSA of ulitsa K. Marxa, 2/4 Moscow Union of Soviet Socialist Republics (U.S.S.R.) a State enterprise organised and existing under the laws of the U.S.S.R. do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: The present invention relates to the art of conducting heat and mass exchange processes and more particularly it relates to methods of forming fluid flow in heat-and mass-exchange apparatus.
The invention can be utilized in apparatus for fractionation, absorption, desorption, dust-trapping, and various processes involving a fluidized bed.
According to the present invention there is provided a method of heat-and massexchange including contacting two media in counter-current manner, a first one of the media being a gaseous medium while the other medium is a liquid medium, dividing said first medium into equal portions, directing said second medium to successively and separately contact respective portions of the first medium, and reuniting said portions into a single flow after contact with said other medium.
An embodiment of the present invention will now be described by way of example with reference to the accompanying drawing which shows a schematic view of heatexchange apparatus.
A flow of a gas G (see the schematic accompanying diagram) is supplied to the apparatus wherein it is to be contacted, and is divided into portions each of which is directed to its own working zone wherein contact devices for effecting interaction between the gas portion and liquid L are arranged, and through a bypass passage by-passing the working zones of the remaining portions of the gas flow. Following this first contacting stage, the above said portions of the gas flow G are reunited into a single gas flow for subsequent direction to the next process stage.
The flow of the liquid L is supplied into the apparatus 1 wherein it is to be con- tacted, passes through the working zone 4 associated with the first portion of the gas flow G, then through the working zone 3 associated with the second portion of the gas flow G and so on in series right through to the working zone associated with the last portion of the gas flow G, whereafter this flow is directed to the successive stage.
The above described pattern of interaction between the liquid and the gas is repeated at each contacting stage.
The contacting stages are designed so that the fluid flow resistance at the contacting of the abovesaid divided portions of the gas flow should be substantially equal, whereby the gas flow can be easily divided into the equal portions.
Thus, the herein disclosed mass and heat-exchange method according to the present invention enables an increase of the mean flow rate of the gas across the section of the apparatus, as compared with the rate permissible for a single device in a working zone, and as will be appreciated the liquid-to-gas ratio in each contact zone will increase in proportion to the portions into which the gas flow at each contacting stage is divided. The increase of the mean gas flow rate enables a reduction in dimensions of the apparatus.
Given below is an example of the herein disclosed method.
Example.
Let us consider an example of utilizing the herein disclosed method of forming fluid flow in apparatus for scrubbing air from dust in granulating towers in ammonium nitrate production.
With the permissible gas flow rate over the cross-section of the apparatus being 2 mlsec., a 12-metre diameter scrubber is normally to be provided to handle 800,000 m3/h of air. A film-contact tray is operated in a hydraulic mode providing intense cleaning of the gas with the scrubbing liquid supply rate of about 1000 m3/h per apparatus. By using the herein disclosed method of dividing the total gas flow into portions (there are three portions in the presently discussed embodiment), the diameter of the scrubber can be reduced to 7 metres, and the supply rate of the scrubbing liquid can be brought down to 350 m3/h, with the dust-trapping process carried in the same hydraulic mode as in the 12-metres diameter scrubber wherein the gas is not divided into portions.
WHAT WE CLAIM IS:- 1. A method of heat-and mass-exchange including contacting two media in countercurrent manner, a first one of the media being a gaseous medium while the other medium is a liquid medium, dividing said first medium into equal portions, directing said second medium to successively and separately contact respective portions of the first medium, and reuniting said portions into a single flow after contact with said other medium.
2. A method as claimed in Claim 1, wherein the reunited first medium is discharged from the apparatus.
3. A method as claimed in Claim 1, wherein the reunited first medium is recycled for a further contacting step.
4. A method as claimed in any one of the preceding claims, and substantially as hereintofore described.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (4)

**WARNING** start of CLMS field may overlap end of DESC **. of dividing the total gas flow into portions (there are three portions in the presently discussed embodiment), the diameter of the scrubber can be reduced to 7 metres, and the supply rate of the scrubbing liquid can be brought down to 350 m3/h, with the dust-trapping process carried in the same hydraulic mode as in the 12-metres diameter scrubber wherein the gas is not divided into portions. WHAT WE CLAIM IS:-
1. A method of heat-and mass-exchange including contacting two media in countercurrent manner, a first one of the media being a gaseous medium while the other medium is a liquid medium, dividing said first medium into equal portions, directing said second medium to successively and separately contact respective portions of the first medium, and reuniting said portions into a single flow after contact with said other medium.
2. A method as claimed in Claim 1, wherein the reunited first medium is discharged from the apparatus.
3. A method as claimed in Claim 1, wherein the reunited first medium is recycled for a further contacting step.
4. A method as claimed in any one of the preceding claims, and substantially as hereintofore described.
GB1944178A 1978-05-13 1978-05-13 Method of forming flows in heat- and mass-exchange apparatus Expired GB1591935A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1944178A GB1591935A (en) 1978-05-13 1978-05-13 Method of forming flows in heat- and mass-exchange apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1944178A GB1591935A (en) 1978-05-13 1978-05-13 Method of forming flows in heat- and mass-exchange apparatus

Publications (1)

Publication Number Publication Date
GB1591935A true GB1591935A (en) 1981-07-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB1944178A Expired GB1591935A (en) 1978-05-13 1978-05-13 Method of forming flows in heat- and mass-exchange apparatus

Country Status (1)

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GB (1) GB1591935A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0193677A2 (en) * 1984-12-14 1986-09-10 Imperial Chemical Industries Plc Treatment of gas mixtures
FR2961115A1 (en) * 2010-06-09 2011-12-16 Inst Francais Du Petrole Method for capturing e.g. carbon dioxide compounds contained in natural gas to limit global warming phenomenon, involves making gas fractions to be in contact with absorbing solution fractions in absorbing sections arranged in same column

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0193677A2 (en) * 1984-12-14 1986-09-10 Imperial Chemical Industries Plc Treatment of gas mixtures
EP0193677A3 (en) * 1984-12-14 1988-06-01 Imperial Chemical Industries Plc Treatment of gas mixtures
FR2961115A1 (en) * 2010-06-09 2011-12-16 Inst Francais Du Petrole Method for capturing e.g. carbon dioxide compounds contained in natural gas to limit global warming phenomenon, involves making gas fractions to be in contact with absorbing solution fractions in absorbing sections arranged in same column

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PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee