US1581545A - Process of preventing incrustation of pipes - Google Patents

Process of preventing incrustation of pipes Download PDF

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Publication number
US1581545A
US1581545A US332903A US33290319A US1581545A US 1581545 A US1581545 A US 1581545A US 332903 A US332903 A US 332903A US 33290319 A US33290319 A US 33290319A US 1581545 A US1581545 A US 1581545A
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Prior art keywords
liquid
pipes
tube
incrustation
sand
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Expired - Lifetime
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US332903A
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Prache Charles
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Priority to US332903A priority Critical patent/US1581545A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D1/00Evaporating
    • B01D1/06Evaporators with vertical tubes
    • B01D1/12Evaporators with vertical tubes and forced circulation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/16Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S159/00Concentrating evaporators
    • Y10S159/20Additive

Definitions

  • This invention has for its object a method for use in connection with evaporating apparatus by which these difficulties are avoided and incrustation prevented by automati cally and continuously cleaning the heatingsurface.
  • cleaning is effected by the aid of a powder such as sand or glass or other equivalent substance having no chemical action upon the liquid to be evaporated, the substance ,is added to the solution which is circulated at a speed such that the substance-is drawn by the solution into contact with the heating surface.
  • the apparatus comprises a number of parallel tubes 1 so arranged that they can be heated on the outside and within which the liquid to be concentrated circulates.
  • the tubes are carried by two plates 2 and are arranged within acasing 3 which forms the heatin chamber; heating steam is admitted throug the tube 4 and condensed steam passes out throu h the tube 5.
  • a tube 8 which is connected to a tube 9 leading from the upper chamber 7 by pipes 10 and 11; a displacer such as a porn or screw 12 or its equivalent and driven by a belt or'electric motor is located near to the bottom of the apparatus for the purpose of continuously forcing liquid in the pipe 10 through the pipe 11 towards the chamber 6.
  • Liquid to be concentrated is led into the apparatus through a tube 13 while an overflow 14 allows continuous outflow of the concentrated liquid and regulates the level of liquid in the apparatus.
  • the apparatus operates as follows:
  • the apparatus is filled with liquid to be concentrated through the tube 13 until liquid overflows through the overflow 14.
  • a certain quantity of fine sand or its equivalent is introduced through a door 16 and falls into the liquid through the tube 10; the door is then closed and the circulating pump 12 put into action; liquid circulates in the direction indicated by the ar-- rows 17 and owing to the rapidity of the circulation the sand remains in suspension in the liquid and circulates through the appaa ratus while intimately mixed with it.
  • circulation steam is admitted through the tube 4; the steam condenses around the tubes and passes out as water through the tube 5 while a weight of water substantially equalis evaporated from the liquid circulating in the evaporating apparatus. The resulting steam passes out through the tube 15.
  • the inlet provided consists of a portion 18 of a size'suflicient to reduce the speed of the rising liquid to a speed such that the grains of sand are not drawn upwards.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)

Description

April 20 1926.
C. PRACHE PROCESS of PREVENTING INCRUSTATION OF PIrEs Fil ed Oct. 24, 9
Patented Apr. 20, 1926.
PATENT OFFICE.
CHARLES rnaonn, or rams, rnancn.
PROCESS OF PREVETKTING INCRUSTATION OF PIPES.
Application filed October 2'4, 191%). Serial No. 332,903.
To all whom it may concern:
Be it known that I, CHARLES PRACHE, of 106 Boulevard Haussmann, Paris, France, engineer, have invented new and useful Improvements in Processes of Preventing In 'crustation of Pipes, which improvements-are fully set forth in the following specification.
It is known that the evaporating apparatus employed in industry for the evaporation of liquids orior the distillation of water become ineflicient owing to the deposit of calcium and other salts upon the heating surfaces. Such deposits besides afiecting theeificiency of the apparatus cause frequent stoppages for cleaning purposes which is always a diflicult and imperfect operation.
This invention has for its object a method for use in connection with evaporating apparatus by which these difficulties are avoided and incrustation prevented by automati cally and continuously cleaning the heatingsurface. 7 According to this invention cleaning is effected by the aid of a powder such as sand or glass or other equivalent substance having no chemical action upon the liquid to be evaporated, the substance ,is added to the solution which is circulated at a speed such that the substance-is drawn by the solution into contact with the heating surface.
The apparatus capable of use in carrying out the invention is illustrated in the accompanying drawing which is a vertical section.
The apparatus comprises a number of parallel tubes 1 so arranged that they can be heated on the outside and within which the liquid to be concentrated circulates. The tubes are carried by two plates 2 and are arranged within acasing 3 which forms the heatin chamber; heating steam is admitted throug the tube 4 and condensed steam passes out throu h the tube 5.
6 and 7 are c hambers fixed to the plates 2. Into the bottom of the lower chamber leads a tube 8 which is connected to a tube 9 leading from the upper chamber 7 by pipes 10 and 11; a displacer such as a porn or screw 12 or its equivalent and driven by a belt or'electric motor is located near to the bottom of the apparatus for the purpose of continuously forcing liquid in the pipe 10 through the pipe 11 towards the chamber 6.
Liquid to be concentrated is led into the apparatus through a tube 13 while an overflow 14 allows continuous outflow of the concentrated liquid and regulates the level of liquid in the apparatus.
The apparatus operates as follows:
The apparatus is filled with liquid to be concentrated through the tube 13 until liquid overflows through the overflow 14.
A certain quantity of fine sand or its equivalent is introduced through a door 16 and falls into the liquid through the tube 10; the door is then closed and the circulating pump 12 put into action; liquid circulates in the direction indicated by the ar-- rows 17 and owing to the rapidity of the circulation the sand remains in suspension in the liquid and circulates through the appaa ratus while intimately mixed with it. When circulation is established steam is admitted through the tube 4; the steam condenses around the tubes and passes out as water through the tube 5 while a weight of water substantially equalis evaporated from the liquid circulating in the evaporating apparatus. The resulting steam passes out through the tube 15.
The sand maintained in suspension in the liquid keeps the tubes perfectly clean byfrictional contact and removes any deposits of lime which tend to fix themselves on the tubes. I I
While the apparatus is at work liquid to be concentrated is continuously introduced intothe apparatus through the tube 13 in order to compensate'for the weight of the water evaported and in order to cause the outflow of concentrated liquid through the overflow 14. I
In order to prevent sand passing out through the overflow 14, the inlet provided, consists of a portion 18 of a size'suflicient to reduce the speed of the rising liquid to a speed such that the grains of sand are not drawn upwards.
When after a stop the apparatus is again set in action, steam is first injected through the tube 19 with the object of placing any sand which has deposited at the bottom in sus ension inthe liquid.
laim: I r
The process of preventing incrustation of pipes through which a liquid, containing solids in solution, to be evaporated circulates which consists in introducing into the p liquid an abrasive in comminuted form, said "and in replenishing the liquid to coinpengtbrasive being insoluble and chemically neusate for evaporation of'same and to ex el tral with respect to the liquid, in maintainconcentrated solution from the circulatlng 10 ing the abrasive in suspension in, the li uid system while retaining the abrasive therein.
5 so as to circulate with itthro'ugh the pipes In testimony whereof I have signed this by rapidly propelling the liquid and abrasive specification.
mechanically under the, influence of heat, CHARLES PRACH E;
US332903A 1919-10-24 1919-10-24 Process of preventing incrustation of pipes Expired - Lifetime US1581545A (en)

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US332903A US1581545A (en) 1919-10-24 1919-10-24 Process of preventing incrustation of pipes

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US332903A US1581545A (en) 1919-10-24 1919-10-24 Process of preventing incrustation of pipes

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2817504A (en) * 1953-09-30 1957-12-24 Freeport Sulphur Co Mining of sulfur using hot saline water containing a small percentage of finely divided earthy material
US2882022A (en) * 1952-08-26 1959-04-14 Lucien H Greathouse Heat exchanger
US2976854A (en) * 1957-10-09 1961-03-28 Salem Brosius Inc Fluid cooled furnace structure
US4237962A (en) * 1978-08-11 1980-12-09 Vandenhoeck J Paul Self-cleaning heat exchanger
US5964982A (en) * 1996-07-23 1999-10-12 Metallgesellschaft Aktiengesellschaft Method of removing encrustations in evaporation plants
US20100243208A1 (en) * 2009-03-17 2010-09-30 Kar Kishore K Tube-side sequentially pulsable-flow shell-and-tube heat exchanger appratus, system, and method
US20180372434A1 (en) * 2015-11-10 2018-12-27 I.D.E Technologies Ltd. Cleaning a multi-effect evaporator
US20220186128A1 (en) * 2020-12-11 2022-06-16 Phillips 66 Company Steam co-injection for the reduction of heat exchange and furnace fouling

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2882022A (en) * 1952-08-26 1959-04-14 Lucien H Greathouse Heat exchanger
US2817504A (en) * 1953-09-30 1957-12-24 Freeport Sulphur Co Mining of sulfur using hot saline water containing a small percentage of finely divided earthy material
US2976854A (en) * 1957-10-09 1961-03-28 Salem Brosius Inc Fluid cooled furnace structure
US4237962A (en) * 1978-08-11 1980-12-09 Vandenhoeck J Paul Self-cleaning heat exchanger
US5964982A (en) * 1996-07-23 1999-10-12 Metallgesellschaft Aktiengesellschaft Method of removing encrustations in evaporation plants
US20100243208A1 (en) * 2009-03-17 2010-09-30 Kar Kishore K Tube-side sequentially pulsable-flow shell-and-tube heat exchanger appratus, system, and method
US9068782B2 (en) * 2009-03-17 2015-06-30 Dow Global Technologies Llc Tube-side sequentially pulsable-flow shell-and-tube heat exchanger appratus, system, and method
US20180372434A1 (en) * 2015-11-10 2018-12-27 I.D.E Technologies Ltd. Cleaning a multi-effect evaporator
US10955203B2 (en) * 2015-11-10 2021-03-23 Ide Technologies Ltd. Cleaning a multi-effect evaporator
US20220186128A1 (en) * 2020-12-11 2022-06-16 Phillips 66 Company Steam co-injection for the reduction of heat exchange and furnace fouling

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