US2199258A - Dehydrator - Google Patents

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Classifications

• • 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
  • B01D53/26—Drying gases or vapours
• • 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
  • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
  • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
  • F25B43/003—Filters
• • Y—GENERAL 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
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S210/00—Liquid purification or separation
  • Y10S210/06—Dehydrators

Definitions

• This invention relates to dehydrators, and with in place by the circular end of the inserted regard to certain more specific features to lterhousing I. ing dehydrators for refrigerating and like
• the cap 5 is also provided with ribs II for supsystems. porting another similar screen I5.
• the outer fiange .4 is held by 10 of the class described which avoidsfor longer the inserted end of the body I and the inner periods, undesirable evaporation into a gas of flange 6 serves as a holder for the flange 2l of. a refrigerating liquid before the liquid reaches the ne-mesh conical screen 23, the latter also being, expansion valve; the provision of a dehydrator for example, of the order of 150-mesh.
• the apex of. the class described which is simple in form of the conical screenv 23 is directed upstream. 15 and consequently more economical to makeandI Its base is near the wall I so as to form a cirwhich is an improvement upon devices such as cular trough-like sump.
• both portions 25 which will be indicated in the following claims. 25 and 29 are' preferably fibrous.
• body I is located dehydrating material such as :i0 Fig. 1 is a longitudinal section of, the device; lumps of activated alumina or calcium oxide 21. 30 and, 'I'he lump form of the material renders the total Fig. 2 is a side elevation. mass of it foraminous.
• dehydrating material such as :i0 Fig. 1 is a longitudinal section of, the device; lumps of activated alumina or calcium oxide 21. 30 and, 'I'he lump form of the material renders the total Fig. 2 is a side elevation. mass of it foraminous.
• both Similar Vreference characters indicate correcaps 3 and 5 are soldered to the body I or othersponding parts throughout the several views of wise autogenously fastened.
• the present invention is directed particularly adapter .1, and a suitable line is attached to the to dehydrators for use in the liquid lines of readapter 9 and leads to the expansion valve.
• They irigerating systems. These are generally located device may be used elsewhere in a refrigerating between the receiver and the expansion valve or system, but it is intended that only liquid refrig- 40 valves.
• a purpose of the dehydrator is to preerant shall flow through it. 40 vent the passage of moisture to the expansion Dehydrating agents such as those above noted valve and other parts. -In serving this purpose, partially break down into a fine powder.
• For the dehydrator shouldl not permit the passage example, calcium oxide, upon the addition of into the liquid line of solid particles. moisture, forms calcium hydrate, generally is shown at numeral I an elongated housing, pre'l, break down because of erosion which is due to erably made of a copper tube or the like. On rubbing of one particle against another.
• this housing at one end is an inlet cap 3 having In either of the above and similar cases, the an inlet adapter 1, and at the other end an outlet small particles will clog the ordinary fine, fiat 'cap 5 having an outlet adapter 9. screen, thereby causing a pressure drop in the 50 Within the cap 3 are three ribs II, which, with refrigerant.
• Such pressure drop in the refrig ⁇ a shoulder I3 form a support for a fine-mesh erant is detrimental because it causes a partial inlet screen I5, for example, of -the order oievaporation of the refrigerant and consequently 'meslL Adjacent the edge of the screen is a results in delivery of gas bubbles into the liquid which, reaches the expansion valve, instead of being'l homogeneous is composed of li f d and gas bbles. ⁇ Expansion valves do no operate properly if there are gas bubbles in the liquid.
• any small particles of theA dehydrating agent that break off and become free are carried along with the refrigerating fluid.
• the general direction of flow of the refrigerating fluid is exempli- 1 9 filed by the vertical arrow A which carries the particles along until the screen 23 is reached. Since the very'iine screen 23 presents between its interstices only very small (if any) components of its openings in the longitudinal direction, the
• the conical shape has advantages in that a sloping surface is presented by the screen, whereby liquid flow is accommodated with little interference while solid particles are deflected. At the same time, the deflected particles are guided into relatively harmlessperipheral positions.
• the device may be used in other positions.
• the operation is substantially the same, becauseg'tlie liquid flow through the device tends to maintain the separated particles more or less as indicated, even if not exactly as indicated, in Fig. l.
• Very ne particles that circulate at Vthe surface ofthe screen 23,-substantially the sa e as the. so fluid, and that find their way through the screen are primarily caught by the loose felt 29. Particles that are so fine that they pass through the loose felt 29 are caught by the standard compressed felt pad 25, but, it may be observed 65 that there will be very' few of these.
• the tightly packed fibrous material isthen protected against clogging and serves the function primarily of removing very fine particles. These much-more slowly clog the filter than the larger ⁇ particles would, were they permitted to. enter the4 disc-of fibrous material.
• the conical screen presents a larger area so that the screen 23 may have a substantial part of its base portion completely clogged before the free area becomes less than the free area of either of screens I6.
• the device has the advantage that the cone 23 is springingly held down on the disc 2l by the flanged ring I9.
• the natural tendency of the loose material 29 to expand when packed in place serves to insure that the space within the cone 23 remains substantially filled and Without deleterious voids.
• a tubular body member having an inlet, and an outlet cap having a passage therethrough covered by a relatively iiat screen, a preformed disc ofresilient filtering material on said screen, a conical screed extending into said body member and spaced from said flat-screen and having a flange on said disc, an inwardly and outwardly flanged ring having its inward flange over the screen flange and its outward flange adapted to be held upon assembly by the body ,member and outlet cap whereby the conical screen is springingly held in position against the disc.
• a dehydrator comprising a tubular body member having an inlet, an outlet cap for the body having a passagef'tlierethrcugh covered by a relatively at screen, a preformed disc of relaconicalnscreenspaced from said ilat screen and having a flange on the margin of said disc, an
• inwardly and outwardly ilanged ring having its inward flange over the screen flange and its outward ange adapted to be held upon assembly by the body member and outlet cap, whereby the t conical screen is sprlngingly held in rposition against the disc, and relatively loose filtering material contained within the body member between the disc and the conical screen.
• a dehydrator comprising a body portion having an inlet, an outlet cap fastened to the body portion having a passage therethrough covered by a relatively flat screen, a preformed disc of relatively dense lterlng material on said screen, a conical screen spaced from said flat screen and having a flange on said disc, an inwardly and outwardly flanged ring having its inward flange over the screen flange and its outward flange adapted to be held by said body portion and outlet cap upon assembly.
• the conical screen is springingly held in position against the disc, and loose brous material between the disc and said conical screen, the apex of said conical screen being directed upstream with respect to the flow through the body portion, and
• said body portionl being filled with a Ioraminous mass of dehydrating agent.
• a dehydrator comprising an inlet cap, a tubular body fastened thereto, a screen disc held between said cap and body, an outlet cap fastened to the body and having a passage therethrough covered by a screen disc, a preformed disc of relatively dense felt on said screen, a projecting screen spaced'from said flat screen and having a flange on said feit disc, an inwardly.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Analytical Chemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Filtering Materials (AREA)

Description

Priority Applications (1)

Applications Claiming Priority (1)

Publications (1)

Family

ID=22798841

Family Applications (1)

Country Status (1)

Cited By (28)

• 1938
  • 1938-06-17 US US214373A patent/US2199258A/en not_active Expired - Lifetime

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