Патент USA US2107797код для вставки
Feb.v8, 1938. I , A, MESSER 2,107,797 APPARATUS E’Oi-"i PRODUCING‘ AND STORING OXYGEN 1. - Filed Oct. 17, 1936 If ‘3 ~10 INVENTOR Aab‘lf'lyesser ~ BY ATTORNEYS . r Patented . V8, 71938 _ ' ‘ 2.107.791 UNITED STATES PATENT OFFICE '‘ 2,101,191 . Arrmrus roa raonuomo. ANDs'roRQ ING oxronn ' _ Adolf Mam, Frankfort-on-the-Main,’ Gem - Application _ In October'- 17', 1936, Serial No.'106,165 , Germany September 4, 1936 V - 2 Claims. 7 (c1. 62,-122). ’ g In certain types of air separating plants for the production of oxygen and nitrogen, the liquid ‘oxygen producedkand ‘collected in‘ the recti?ca tion column is forced out by a low pressure, for 5 ‘instance about 0.5 atm_., into the oxygen evapo- ‘ rating coil onv the low pressure side oi the 'ap— - paratus where the liquid oxygen is evaporated. The warmer or outlet end ofqthe oxygen evap orating coil is'generally connected to a gas hold-v ’ '10 er of the ?oating bell type where the oxygen ac holder for receiving the evaporated oxygen. An adjustable regulating valve in the piping between the oxygen evaporator coil and the storage hold "er, regulates the amount of vaporization of the liquid oxygen and effects the storing of the gase- j , In the accompanying drawing there is shown for. the purpose of illustration, an apparatus cumulates and ~from which it is withdrawn-and compressed for storage at a high’ pressure. _ ‘In many cases, especially where the oxygen isproduced at‘ the, plant vwhere it is to be con-, ‘\15 sumed, a pressure of only about 10 atm. is‘ re quired, so that any compressing of the oxygen to ' 5 _ ous oxygen in the holder at the desired pressure. I any higher degree, entailslun'ne'cessary expenses. which embodies the present in?ntion and which 1O may be'used to carry out myimproved process. In this drawing there is shown a column in having a heat interchanger vi i; at the upper end for precooling the incoming air, andv a rectifying section l2 at the lower end for separating the air into oxygen and nitrogen. The air is introduced 16 under pressure through a coil 13 ‘of the inter changer | l in countercurrent heat interchange relationship with the‘coil ll ‘through which they evaporation of the separated liquid oxygen takes . An oxygen producing ‘plant’ suitablev for such oxygen users has been so well developed that even 0 an intermittent ‘operation. of the ‘plant is eco-' ‘ place. This precooled air, after leaving the'heat nomical vand the accumulation of very large interchanger ll, passes through a coil ii at the bottom of the rectifying section where‘the sep , quantities of. ‘oxygen in order to insure a cone arated liquid oxygen collects,-and then through .stantv supply'is not necessary. ~ ’ i ' ' One object of the-present invention is to pro-~ ' an expansion valve It to a nozzle disposed over 25 vide 'a process and apparatus for separating oxy a series of trays i8. ' gen from airand storing ‘said oxygen at a suit » ; able pressure "for use without further compress over the trays II, the nitrogen gas passes up- - ing ‘or the provision for‘very high pressure stor wage“. _ .. ‘,_ ‘a 30 4 In carrying, out thepresent invention,yI pro 'vide, one or more liquid oxygen receivers which are advantageously directly connected with the bottom of the recti?cation column to receive the As the resulting liquid air trinkles downwardly v'wardly'around the'heat. interchanger II and out through an outlet 20 while the oxygen collects in liquid form at the bottom 01 the column. As a feature of the present invention, the liq uid oxygen collected at the bottom of the column III is gradually withdrawn 'and'temporarily stored _in a receiver before passing through the heat in 35 vceiver'has been ?lled'to a predetermined level, terchanger coil ll. ‘As shown, a pipe 24 is con- 35 . the liquid-oxygen‘ supply thereto is shut oif and nected to the bottom of the column l0 and has a the stored oxygen‘ isforcedthrough the oxygen pair of branch outlets 25 and 26 extending into I evaporating coils forming part of the heat inter; the tops'of two receivers 22 and 23, these branch changer for precooling the incoming air._ The es being controlled byvalves 21 and 28. Extending substantially from the ‘bottoms of “very low temperature which exists in the ?lled ' , 7': liquid‘ oxygen from said column; After the ref I receiver normally inhibits rapid evaporation of 45' stance, the second ‘stage-of the aircompressor may be utilized asvsuch pressure means. ‘Preferably more than one receiver is provided,. andthe receivers ‘are ?lled and emptied alter ' . nately ‘so that while one receiver‘ is being filled, ‘ . the receivers 22 and 23 are outlet pipes 30 and . 3i forming branches of a pipe 32 connected to .the liquid oxygen, and in carrying out the pres ent invention, pressure is utilized for forcing out > the inlet end of the oxygen evaporating coil i4. These outlet pipes are provided-with valves 33 the liquid oxygen from said receiver. For in liquid oxygen, the liquid oxygen which has [already been stored in the other receiver is 50“with ' ‘ forced by air pressure throughv the oxygen evap- . -> crating coils‘. as already pointed out. I - 'At the outlet or warmer end of the oxygen evaporating coils,.there is provided a storage gas» , and SI. 45 vMeans are provided for forcing‘the liquid from either of the receivers 22 ‘and 23 through the evaporating coil [4 of the heat interchanger ii. Forqthis purpose there is provided a pipe 36.lead ing from a suitable source ‘of pressure such as the second stage of the air compressor, and hav ing a‘ pair of branch connections 31 and 38 which lead respectively into the upper ends of the re ceivers 22 and 23, and controlled by valves 40 and ll. " . 55 '; 2,107,797 The outlet end of'the oxygen evaporating coil umn at low pressure, and liquid oxygen continu l4 leads to a storage holder 42, the connection ously evaporated and stored at a readily usable between said coil and said holder being controlled vhigh pressure‘ without the use of ‘any additional , by‘ an adjustable regulating ‘valve 43. . This hold 5 er ‘2 is provided with- a valved outlet 44 leading to a' suitable point where the oxygen may be ; used in the workshop.v ~ - _ pumping or compressing mechanism. ‘Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:—- 1 , 4 . ‘ As the oz-wgen is separated and collected in 1. An air separating apparatus including a liquid form in the bottom of the column “I, it is , recti?cation column, a‘heat interchanger,- a liq-i I 10 delivered to and from the receivers 22 and 23 uid oxygen receiver connected to the liquid oxy , alternately. As shown ‘in the drawing, the valves gen collecting portion of said column, a delivery 10 ' 21, 34 and“ are opened and the valves 28,, 33 pipe from said receiver to said heat interchanger, and 40 are closed, so that the liquid oxygen is ., and means for forcing‘ air under pressure into "being delivered through the valve 21 into the ~ said receiver to force the'liquid ‘oxygen therein ' 15 upper end of the receiver 22 while, the liquid ' through the heat interchanger. . oxygen which has already been stored in the re ceiver 23 is forced by the pressure in the pipe 36 through the valve 34 and into the evaporat ing coll M. The evaporated oxygen leaving the ‘ 2_.' An air, separating apparatus including a recti?cation column, a heat interchanger, a pair 01' liquid'oxygen receivers, valved means between the bottom of said recti?cation column ‘and said 15" 20‘0011 ll passes. into the storage holder 42 at a receivers ‘for delivering liquid oxygen from said pressure depending on the adjustment of the column selectively to either one of said receivers, valve’ 43. When theliquidreaches the desired level in thereceiver as shown by the gauge glass 45 or by other suitable means, the valves are re _ 25‘versed. By reversing the valves at the proper intervals, liquidoxygen may be continuously pro duced and‘ continuously withdrawn from the col- I valved means 'for delivering liquid oxygen from I either one of said‘receivers through said heat interchanger; and air pressure means for forcing ~ the liquid oxygen from either one of said receiv 25. ers through said heatinterchanger. ' ADOLF' nmssna.